So is the short arbor part of my problem with the gun not locking up? Right now iam more concerned with the cylinder not locking up when I cock it fast. Also where do you get the buttons if I do have to fix the arbor. Thanks for your help so far guys!

No, that is a seperate problen. The short arbor is causing the cylinder to lock up or be hard to rotate when the wedge is inserted all the way.